BIOTIC Species Information for Thracia spp.
Researched byDr Paul Somerfield & Prof. Richard Warwick Data supplied byPML
Refereed byThis information is not refereed
Taxonomy
Scientific nameThracia spp. Common nameA bivalve mollusc
MCS CodeW2227 Recent Synonyms

PhylumMollusca Subphylum
Superclass ClassPelecypoda
Subclass OrderPholadomyoida
Suborder FamilyThraciidae
GenusThracia Species
Subspecies   

Additional Information
Taxonomy References Howson & Picton, 1997,
General Biology
Growth formBivalved
Feeding methodActive suspension feeder
Mobility/MovementBurrower
Environmental positionInfaunal
Typical food typesPhytoplankton, detritus. HabitFree living
Bioturbator FlexibilityNone (< 10 degrees)
FragilityIntermediate SizeSmall-medium(3-10cm)
Height Growth RateNot researched
Adult dispersal potentialNot researched DependencyIndependent
SociabilitySolitary
Toxic/Poisonous?No
General Biology Additional Information
Biology References Tebble, 1976,
Distribution and Habitat
Distribution in Britain & IrelandFound on all British and Irish coasts.
Global distributionFound in western Europe from Norway to the Mediterranean.
Biogeographic rangeTemperate. Depth range2 - 50 m.
MigratoryNon-migratory / Resident   
Distribution Additional Information

Substratum preferencesCoarse clean sand
Fine clean sand
Muddy sand
Gravelley sand
Physiographic preferences
Biological zoneSublittoral Fringe
Upper Infralittoral
Lower Infralittoral
Upper Circalittoral
Lower Circalittoral
Wave exposure
Tidal stream strength/Water flow SalinityFull (30-40 psu)
Variable (18-40 psu)
Habitat Preferences Additional Information
Distribution References Tebble, 1976, MBA, 1957,
Reproduction/Life History
Reproductive typePermanent hermaphrodite
Developmental mechanismPlanktotrophic
Reproductive SeasonJune to September Reproductive LocationAs adult
Reproductive frequency Regeneration potential No
Life spanInsufficient information Age at reproductive maturityInsufficient information
Generation timeNot researched FecundityInsufficient information
Egg/propagule sizeInsufficient information Fertilization typeInsufficient information
Larvae/Juveniles
Larval/Juvenile dispersal potentialNot researched Larval settlement periodInsufficient information
Duration of larval stageInsufficient information   
Reproduction Preferences Additional Information
Reproduction References MBA, 1957,
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